Telegraph-repeater.



S. VOORHIES.

TELEGRAPH REPEATER.

APPLICATION FILED JULY 2.12m.

Patented J an. 14, 1919.

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TELEGRAPH REPEMER.

APPLICATION FILED IULY 2.1911.

Patented Jan. 14, 1919.

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TELEGRAPH REPEATER.

APPUCATlON FILED JULY 2-1911.

Kite/"neg [/2 venlor ylvesir %0/%ies UNITE STATES PATENT OFFICE.

SYLVESTER ,voozanlns', or ENDERLIN, NORTH DAKOTA.

To all whom it may concern:

Be it knownthat I, SYLVESTER VooRHms, a citizen of the United States,and aresident of Enderlin, in the county of Ransom and State of NorthDakota, have invented certain new and useful Improvements inTelegraph-Repeaters, of which the following is aspecification.

One objectof my invention is to provide a repeater. adapted for workingeither in a mainline or with a main and a duplex line.

Another object of my invention is to provide a repeater of such style asto do away with .all except main line b'atteries when used as a'repeaterin a mainline, and to do away with all batteries except the main linebatteries and'the customary duplex setof batteries when used as arepeater between the mainline and a duplex-line.

Another object of my invention is toprovide in arepeater a'line.controller to allow either the east or the west operator totake controlof the line. i

Anotherobject of my inventionis to provide improved means of adjustmentfor the main line armatures. l

Another object of my invention is to provide arniatures for theinstruments that are extremely light, yet 'ofarigid construction.

Another object of my invention is to provide in a repeater instrumentsand circuits in such manner that the repeater may be connected in'with'a minimum number of connections anddispense with the multipleconnections necessary in the ordinary type of repeater.=

YVith these and incidental objects in View the invention consistsofcertain novel features of construction and combination of parts, theessential elements of which' are hereinafter described with referencetothe drawings which accompany and form a part of this specification.

. In the drawings Figure 1 is a diagram-' matic-circuit showing thewiring of my repeater Fig. 2-is an enlarged detail of the line controlarmature; Fig. 3 is an enlarged detailofithe main line armatures; Fig. 4is an enlarged detail of the main linearmature adjustment means;-Fig. 5is a section taken on the line 55,'Fig.' 6; Fig." 6 is an end elevationof one of the main line armaturesy -Fig. 7 is a diagrammatic circuit oftheconhectin'g'lines; and"F1g. 8 -1s a dia- TELEGRAPH-REPEATER.

Specification of Letters ream.

Main Zine repeater. I Asshown in Fig. 1, .W represents the west go ng'mam l1ne"1nstrument; E the east going main line instrument; C the linecontroller; S a' four pole double throw switch for changing the circuitsfrom a mainline repeater'to a half-duplex and a main-line repeater. 9 c.

In Fig. 7, .7 represents the main line battery atv the distant west linestation, the instruments being omitted for simplicity as their action isWell known to all skilled in the art.

Battery current flows from the .main line battery 7 through the mainline 8 to a connecting postl. E

Looking at Fig. 1, the circuit is from the connection post 1 throughwire 9, resistance 10, wires 11 and 12, spring 13, contact 14, armature15, wire 16, magnet coil 17, wire 18, connection post 2; and referringto Fig. 7, through wire 19 to battery 21 at the main station.

Patented Jan. 14, 1919. I Application filed July 2, 1917. Serial'No.178,270.

As the west main line batteryis' grounded wire 31, switch blade 32,wires33fiand- 34',

spring 35, contact '36, armature 37, 'wires 38 'and'39, switch blade'iO, wire 41, magnet I will be maintained by 1 moved to the right,

tion so that either contact the spring 47 and coil 42,.wire 43,connection post 3; and looking at Fig. 7, from connection post 3,through wires 44 and 20 to the central line battery 21, which isgrounded at 23.

It is evident that the magnet coil 17 of the main line instrument E isthus con.- trolled by the contact 14 which is directly in the main linecircuit going west, and that themagnet coil 42 is controlled by contact36 which is directly in the main line circuit going east.

Hence if the east operator opens his line, the actuating coil ofinstrument W will be deenergized, and if the west operator opens hisline the actuating coil of instrument E will be deenergized.

Referring to Fig. 3, it is seen that when the armature 15 is released,the contact 51 ismade before the contact 36 is broken, a circuit beingestablished which includes both contacts 36 and 51 for a fraction of asecond, and this momentary contact controls the actuation of the linecontroller C, Fig. 1.

Also referring to Fig. 2, it is seen that the compression spring 47holds the armature 48 in either a right or left hand posi- 49 or contact50 is at all times made, and that 49 is not opened before the armature48 is passed its central position, and hence will thereafter bemaintained in its right hand position by likewise when the armature 48moves to the left, the contact 50 will not be opened until the armature48 ha's'passed the central point in its left hand motionfand hence itsleft hand position the spring 47. Also it is to be noted that the makecontact will be closed before the break contact is opened.

Therefore, whenever the west line instrument is opened and the armature48 is the contact 50 will be maintained closed and the contact 49maintained opened until a new circuit has been established. Likewisewhen the east line instrument is opened and the armature hasbee'ir-moved to the left, the contact 49 will be maintained closed andthe contact 50 maintained opened until a new circuit has beenestablished.

As described in the actuating circuit of the coils 17 and 42, theresistances 10 and f lowing circuit.

30 respectively are in series with the coils and the'line controllercoils CE and CW are actuated by bringing them across these resistancesrespectively, as shown by the fol- When the west line operator opens hisline thereby cle'e'nergizing coil 17, the armature 37 isdrawn-backwardly opening contacts 85, 36, and closing contact 51. Thiscontact bridges the coil CVV'across the resistance 30,

the circuit being as follows:

Resistance 30, wire 31, switch blade 32, wires 33 and 34, spring 35,contact 51, wire 52, switch blade 53, wire 54, coil CW, wire 55, contact56, spring 57, wire 58, wires 28 and 29, to the other side of theresistance 30, thus actuating the coil. CWV, closing contact 49, andopening contact 50.

Contact 49 is bridged across contact 14 as indicated by wires 59 and 60,and contact 50 is bridged across contact 36 as indicated by wires 61 and62.

The armature 48 which controls the springs 64 and 65 is so arranged withthe springs and with contacts 49 and 50 that when the armature movesfrom right to left contact 49 will be made before contact '50 is broken,and when the armature moves from left to right contact 50 will be madebefore contact 49 is broken.

The current flowing through the resistance 30, as already traced, passesthrough contact 36 which we have just seen is opened as the armature 37is drawn back.

However, the contact 50 is bridged across contact 36 so that the actualbreaking of the circuit feeding battery through resistance 30 isaccomplished by the opening of the contact 50 after the armature 48 hasmoved to the left.

The line now being under control of the -Dwplew and main line repeater.

When the west operator wishes to take control he opens his line, his ownline circuit which is thus opened being exactly as heretofore describedwhen the instrument was used as a main line repeater.

However, in the half-duplex circuit when the coil 17 is thus deenergizedthe line controller is actuated by bridging the low; re-' sistanceportion of CVV acrossv theresistance 30, the resistance 30 beingincluded in the duplex line circuit as follows:

Battery 66, Fig. 8, wire 67, terminal 5, and referring to Fig. 1, wire68, switch blade 40, the switch S now being thrown in its right handposition, wires 39 and 38, armature 37-, contact 36, spring 35, wires 34and 33, switch blade 32, wire 70, resistance coil 30, wires 71, 28, and27, terminal 4; and referring to Fig. 8, wire 72, pole-changer coil 73,wire 74, to the other side of the battery 66.

To energize the coil CW it is bridged across the live resistance 30 inthe same manner as the coil CW was bridged across the resistance 30 inthe main line repeater, and this new bridging circuit is as follows:

Resistance 30, wires 71, 28, and 58, sprin 57, contact 56, and wire 55to one side 0 the low resistance coil CW from the other side of thecoil, through wire 75, switch blade 53, wire 52, contact 51, spring 35,wires 34 and 33, switch blade 32, wire 70, to the other side of theresistance coil 30', thus energizing the controller, closing contact 49and opening contact 50.

The west operator now telegraphs as usual, energizing coil 17 at eachclosing of the circuit thereby closing contact 36 and as contact 36 isacross terminals 4 and 5, Fig. 1, he thus energizes the local circuitrunning from terminals 4 and 5, as shown in Fig. 8, thus actuating thepole changer 73.

The operation of the pole-changer 73 places positive or negative currentfrom batteries 77 and 78 respectively on the line 79 thus actuating thehalf-duplex set 80 at the distant east station, the current passingthrough the coil 81 of the duplex at the center station, and as thisoperation is well known to all those skilled in the art, it Wlll not befurther described.

When the distant half-duplex east operator wishes to take control of theline he changes the polarity at his instrument as in the ordinarymanner, thereby opening the contact 82 of the center polar relay.

This contact 82 merely puts battery on and off of the terminals 3 and 6,and as the east operator has now taken battery oil of 3 and 6 he therebydeenergizes the low resistance coil 42', Fig. 1, which is merely bridgedacross the terminals 3 and 6.

The actuation of the controller coil CE is now similar to that describedin the cir cuit for the main line repeater in respect to CW.

In this case, however, the coil CE is bridged across the resistance 10,the circuit being as follows:

Resistance 10, wire 11, spring 13, contact 83, wire 84, coil CE, wire52, contact 85, spring 86, wire 87, to the other side of the resistance10.

In order to make the adjustment of the main line armatures as simple aspossible so that adjustments can be readily made by the ordinaryoperator, the spring 88, Fig. 4, extends outside of the case inclosingthe main line instrument, so that the thumb nut 89 is accessible withoutmoving the cover.

A lever 90 is hinged on a shaft 91 and a spring 92 serves to maintain itagainst the end 93 of the thumb screw.

The spring 88 which is hooked to the armature is attached at 94 to theend of the lever 90 so that by turning out the thumb nut 89 greatertension is exerted on the spring 88 as the spring 92 over balances thespring 88.

For efiicient working of an instrument of this class a light yet rigidarmature is a necessary feature, and to provide this I form the armature37 of light Norway iron or other suitable material and turn a flange 95about its edge as shown in Figs. 5 and 6.

While I have described my invention and illustrated it in one particulardesign, I do not wish it understood that I limit myself to thisconstruction as it is evident that the application of my invention maybe varied in many ways within the scope of the following claims.

Claims:

1. A telegraph repeater comprising a air of main line instruments, aline contro ler, an electrical circuit connected therewith for operatingsaid instruments as a main line repeater, an electrical circuitco6perating with said instrument for operating said instrument as a mainline and half-duplex repeater, and means associated with said circuitsfor changing from one to the other of said circuits.

2. A telegraph repeater comprising a air of main line instruments, aline contro ler, a circuit co-acting with said main line instruments andsaid controller for actuating the combined instruments as a main linerepeater, a second circuit co-acting with said instruments for actuatingsaid combined instruments as a main and half-duplex line repeater, andmeans for selecting either of said circuits at will.

3. In a telegraph repeater the combination of a pair of main lineinstruments and a line controller, circuit connections for the actuationof said controller through said main line instruments, a second circuitincluding said main line instruments and said controller and includingtherein terminals, one pair of which is connectible to the local circuitof a half-duplex pole changer, the other pair of which is connectible tothe local circuit of a half-duplex polar relay, means for selectingeither of said two circuits, said line controller being under control ofeither main line operator when used as a main line repeater, or underthe control of the main line operator and the halfduplex line operatorwhen used as a main line half-duplex line repeater.

SYLVESTER VOORHIES.

00910! of this patent my be obtained for five cents each, by addressingthe Commissioner 01 ratents,

Washington, D. O.

